Superheater support



our-reef stares it" ll s) WALTER F. KEENAN, JR, OF NEW YORK, 11'. Y., ASSIGNOR T0 EOW'JER SPECIALTY COMPANY, A CORPORATION OF NEW YORK.

T 0 all whom it may concern.

Be it known that l, WALTER F. KEENAN, Jr., a citizen of the United States, residing at New York, in the county and State of New York, have invented certain new and useful Improvements-in superheater Supports, of which thefollowing is a full, clear and exact description.

The invention formin the subject of this application for Letters Tatent resides in a novel and improved means of supporting the superheaters in boilers of that certain type or class known in the art as horizontal water tube boilers.

In the case of such boilers when designed for superheaters, it has in certain installations been the practice, to divide the bank of boiler tubes longitudinally, and to place the superheater in the space between the two sets of tubes.

The weight of the superheater lies in large part in the headers and in part in the heating tubes, which are rigidly connected to headers and maintained in proper position thereby. Where the distance between the side walls of the boiler is not too great, theseheaders may be made of suflicient length to span'such space and be supported by any suitable means located in the side walls, but even so to provide the proper beam strength in some installations, the

headers must be made larger than would otherwise be required for themere passage of the steam, and this would be objectionable because of the greater cost and additional space demanded- WVhere wide boilers are used there are structural difiiculties in the way of making the headers long enough to span the full width of the setting and with these wide boilers, multi parts headers may be desirable.

It has hence been generally recognized that the most promising; and practical method of supporting such superheaters involves an overhead support, but this, in turn. involves a problem by no means easy of solution, as provision must in such cases be made for numerous contingencies which actual practice have shown to be almost in evitably met with.

Seeking a solution ofthis problem, I have devised a depending hanger supported from some overhead support independent of the boiler tubes, and not dependent upon such tubes for its stability. That such a means SUPERHEATER SUPIEORT.

Specification of Letters Patent. l atemtj gqjl Mum; 23, 1922, Application filed January 29, 1921.

Serial No. 440,847.

is practically necessary follows from themore or less obvious reasons that the boiler tubes themselves are not of sufficient strength.

I therefore have designed a dependent supporting means comprising a. formed metal hanger, which may be either cast or forged, containing passages through which the boiler tubes in alternate and staggered rows extend. These hangers are supported from an overhead beam or beams, lying above and outside the boiler and outside the direct influence of the high temperature zone. The lower end of this hanger is provided with a device in the nature of a stirrup which supports the superheater headers.

By this construction numerous important advantages are secured. A strong and reliable support is secured for any form of superheater without sacrifice of space, and by reason of the intimate contact of such hanger to the boiler tubes the latter exer' cise a cooling effect thereon which protects the metal from in ury by exposure to the gases of very high temperature.

This improvement is illustrated in the accompanying drawings in which:

Figure l is a side view of a water tube boiler ofthe kind contemplated in this case. showing a superheater supported therein by my improved device.

Fig. 2 is an enlarged view of a portion of the boiler tubes showing the hanger partly in section; and.

Fig. 3 is a sectional view of the bank'ot' tubes exhibiting the relation thereto of the hanger.

The boiler setting and appurtenances may be of the usual character provided they involve a longitudinally divided bank, preferably of staggered tubes A. In the space between the upper and lower sets is the superheater B, the heating tubes of which are connected with headers C, D.

These headers are supported at near their middle by a stirrup E attached to a formed hanger F containing passages through which pass the boiler tubes of alternate rows. The hangers are connected in any suitable man ner to cross beam G supported in any suitable manner above the boiler, and'rods H, preferably connected to such supports and to the hangers F, pass up through the refractory wall at the top of the boiler.

In practice bafies K are employed to direct the flow of the gases overthe tubes of the boiler and the superheater, and for the sake of greater stability, the superheating tubes at one or more points are connected to the boiler tubes by any suitable means L.

Aside, however, from the hangers, their means of support and the general manner in which they are connected to the headers, the details of construction are immaterial.

What I claim as my invention is 2- 1. The combination with a water tube boiler of the kind herein described, of a super-heater located in the space between the divided bank of tubes, of a metal hanger extending down to said space and containing passages through which the boiler tubes extend, a beam support for said hanger above the boiler, and a stirrup at the lower end of the hanger by means of which the superheater headers are supported.

2. The combination with a water tube boiler having horizontal rows of staggered tubes divided horizontally to form a space for a superheater, of a superheater located in such space, a hanger connected to the headers of said superheater and passing up through the bank of tubes above the same, the said hanger having passages through which pass the tubes of alternate rows, and

a beam support above the boiler to which the upper end'of said hanger is connected.

V The combination with-a Water tube boiler having a plurality of banks of Water tubes, of a superheater disposed below said tubes. a hanger connected to support said superheater and having portions thereof passing directly through and between thebanks of Water tubes disposed above the superheater, said portions having extended surfaces in contact with the water tubes so as to be cooled thereby, and a beam support above the boiler to which the upper end of said hanger is connected.

'4. The combination with a water tube boiler having banks of water tubes, of a superheater disposed below said tubes, a

hanger connected to support said superheater and havmg portions passing up through the bank of boiler tubes above the same, the said hanger having passages through which the boiler tubes extend whereby said tubes exercise a cooling effect on said hanger, and a beam support above theboiler to which the upper end of said hanger is connected.

In testimony whereof I hereunto alfix my signature.

. WALTER F. K'EENAN, JR. 

